A hydrogen generation device and method based on pressure control, and fuel cell system

Abstract

The invention discloses a hydrogen generating device and method based on pressure control and a fuel cell system. The device comprises a sodium borohydride liquid storage tank, a solution filling pump, etc. The sodium borohydride liquid storage tank is connected to the solution filling pump, the solution filling pump is connected to a buffer tank and a hydrogen production reactor by hydrolysis respectively, a reversible metal hydrogen storage container is used for storing hydrogen, and a pressure control pipe between the hydrogen production reactor by hydrolysis with a catalyst and the buffertank is equipped with a balance valve, and a first air outlet pipe connected to the pressure control pipe is equipped with a discharge valve. The method includes: preparing a sodium borohydride solution, closing the balance valve and opening the discharge valve, starting the solution filling pump to allow the solution to enter the buffer tank, turning off the solution filling pump and closing thedischarge valve, opening the, opening the balance valve to enable the solution to flow into the hydrogen production reactor by hydrolysis, and separating out hydrogen under the action of the catalystfor storage. The fuel cell system includes the hydrogen generating device. The device provided by the invention has the advantages of high safety, easy control of the reaction process, etc., and is suitable for small mobile power packs, emergency power stations and other occasions.

Description

technical field [0001] The invention relates to the technical field of hydrogen fuel cells, and more specifically, the invention relates to a hydrogen generation device and method based on pressure control, and a fuel cell system. Background technique [0002] Hydrogen-air fuel cells use hydrogen as fuel, and chemically react hydrogen with oxygen in the air through catalysts, proton exchange membranes and complex electrode structures to release electrical energy. In the process of applying hydrogen-air fuel cells, the preparation and storage of hydrogen fuel has always been a key technology. [0003] At present, the main production methods of hydrogen include: hydrogen production by electrolysis of water, hydrogen production by fossil fuels, hydrogen production by alcohols, hydrogen production by solar energy, hydrogen production by ammonia decomposition, biological hydrogen production and nuclear energy hydrogen production. Although the above methods can all produce hydroge...

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Problems solved by technology

[0003] At present, the main production methods of hydrogen include: hydrogen production by electrolysis of water, hydrogen production by fossil fuels, hydrogen production by alcohols, hydrogen production by solar energy, hydrogen production by ammonia decomposition, biological hydrogen production and nuclear energy hydrogen production. Although the above methods can all produce hydrogen, However, there are often many problems in practical applications; for example, hydrogen production from fossil fuels and hydrogen production from ammonia decomposition have problems such as complex processes, high energy consumption, difficult reaction control, difficult to handle by-products, and difficulty in obtaining pure hydrogen. Hydrogen production from electrolyzed water and alcohols often have problems such as high power consumption and high investment; moreover, traditional hydrogen storage methods often have problems such as high pressure, easy corrosion of organic liquid hydride containers, and poor safety, especially in When hydrogen production and storage devices are applied to weapons and equipment, the traditional hydrogen production and storage devices are extremely prone to explosion after the weapons and equipment are attacked. Therefore, the existing hydrogen production and storage devices cannot be used on a large scale in military equipment

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